Muni Subway Maintenance Project
The SFMTA maintenance crews work hard every night after Muni Metro subway service hours to maintain the tracks and equipment underground. On most nights, this gives them only about two hours to get work done. In order to complete critical maintenance tasks that cannot be completed during normal windows, we are planning a week of early subway closures, so crews have more hours each night to do this vital work. This is our ongoing effort to maintain the subway infrastructure to ensure safety and reliability. The last early subway closures for maintenance took place in August 2022.
We are planning early subway closures from Thursday, March 16, through Wednesday, March 22. The subway between Embarcadero and West Portal will close early at 9:30 p.m. Buses will connect all stops on Market Street, beginning at 9:30 p.m. through the normal end of train service at 12 a.m. while the subway is closed for maintenance. T Third train will provide regular service from Sunnydale to Chinatown until 12 a.m. Owl service will remain unchanged. Trains will start regular morning service each day.
The maintenance will cover overhead lines, tracks, signals and the Automated Train Control System, a signal system that tracks the location and speed of any trains in the subway.
Thank you for your patience and understanding while we improve the safety, reliability and on-time performance of the Muni Metro system.